1985 OMC 65, 100 and 155 HP Models Commercial Service Manual, PN 507450-D, Page 332Get this manual
Safety Warnings
Before working on or removing any electrical parts, disconnect the battery cables at battery to prevent electrical sparksBefore returning the outboard motor to the owner, make sure:all electrical connections are tightinsulator boots and sleeves are in placeelectrical wires are routed and clamped in the original positionDo not touch high voltage ignition coils or spark plug wires when engine is being started or when runningElectrical shock may result in involuntary contact with rotating flywheelWhen working around batteries, read cautions provided by battery manufacturerBattery electrolyte is an acidic solution and should be handled with careIf electrolyte is spilled or splashed on any part of the body, immediately flush the exposed area with liberal amounts of water and obtain medical aid as soon as possibleDo not use jumper cables and booster battery to start engineDo not charge battery in the boat with an external chargerFumes vented during either operation can lead to an explosionReplace any locking type fastener (example: lock nut or patch screw) whose locking feature becomes weak, Definite resistance to tightening must be felt or locking fastener is not suitable for continued useReplace only with authorized replacement part or equivalent